【摘要】 将高温固相法制得的YBCO研磨,于无水乙醇中进行超声分散获得纳米YBCO/乙醇溶胶,随后掺入纳米金溶胶,浓缩、干燥得金掺杂的YBCO材料.结果发现,纳米金掺杂的YBCO/乙醇溶胶中粒子形成纳米链;掺杂适量金提高了YBCO的晶化程度;掺金量为0.025wt%～0.500wt%时,金/YBCO材料的超导转变温度T_e为93.84～92.01 K,但掺杂1%的金时,样品超导性能消失.若能进一步控制好掺金量,金掺杂YBCO的T_e也会相应得到提高.更多还原

【Abstract】 YBCO bulk material by high temperature solid state reaction was milled and dispersed by ultrasonic process in alcohol solvent and nanoscale YBCO/alcohol sol was obtained.Then it was mixed with nano-Au sol and YBCO doped with Au materials were prepared after concentration and drying.The results show that the nanoparticles form nano chain in YBCO/ethanol sol doped with nano-Au.The degree of crystallization of YBCO is increased by doping with an appropriate amount of Au.Doped with 0.025%～0.500%by weight percentage of Au,the T_c of Au/YBCO materials are 93.84～92.01 K,but the superconductivity disappear with 1%of Au.The T_c YBCO doped with Au will be improved accordingly if the amount of Au can be further controlled.更多还原